Note 3 - Acquisitions and Divestitures - Transaction Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Transaction related expenses	$ 2	$ 72
Broadcast Licenses [Member]
Transaction related expenses	1	38
Corporate and Administrative [Member]
Transaction related expenses	1	34
Legal, Consulting and Other Professional Fees [Member]
Transaction related expenses	1	24
Incentive Compensation and Severance Costs [Member]
Transaction related expenses	1	19
Termination of Sales Representation Agreements [Member]
Transaction related expenses	$ 0	$ 29